Riding mower



FIG. 1 is a front right side perspective view of a riding mower showing our new design.

FIG. 2 is a rear view of the riding mower design of FIG. 1.

FIG. 3 is a left side view of the riding mower design of FIG. 1; and,

FIG. 4 is a top view of the riding mower design of FIG. 1. 

The ornamental design for a riding mower, as shown and described. 